Headset earcup



FIG. 1 is a front elevational view of a headset earcup showing our new design, the rear view being a mirror image, the broken line showing of the headset on FIG. 1 is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a headset earcup, as shown and described. 